Is there a way to set ticket properties via email commands?
The best example on what I mean and how it's done, is Zendesk's guide;
Using the Mail API to update ticket properties from your inbox – Zendesk help
This is an example from another platform;
status:closed - Close ticket status
priority:high - Assign ticket as high priority
source:email - Notify source as email
group:sales - Assign to Sales group
product:[name] - Assign under Product [name]
agent name:[support] - Assign to [agent name or email ID]
action: note - Add a private note to the ticket